1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb575462a8afa1f3cc97d38f19da9ba60fdd89536884c6d5813623839db92e4d6. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d7727a50-493c-41f5-a0d7-4a22b52d2c7a.json and https://artists.proofprofile.net/proofs/artist/d7727a50-493c-41f5-a0d7-4a22b52d2c7a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb570f3c661b1e01a08f019f1e9fd865a703e8a20379a9461445c76054c0a90f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUW81100061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b45119703107f3cca4a5f0662200f3754fadce471b60192027f35c4f0eef7da. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USYBL1500120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc1c81f4e842d6c98b7e3a63c0f42d81642711b2a664247c9e0f162defb0824e. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DECY61600057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf50596fa7efa413d016a7873fbe4d571833520cb8d4be16ea70ba7ad7b3dca. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEG931750354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50bd2ef4771166b228e1572d48e6f3ce3be4ea4d7d18a7736ea4fedb05a38ed8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEG931750355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe6260da3f33f2c6c64c233023f98413810fa9712794bca16d6162da245fe226. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEG931750356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a6e19edea2c9f26d2f0dfe043eedc10d23005b6d6be9466d5dec0ebc8be4af0. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEG931850979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd53c443925f18c8fcdd296fa87826bff6e7de1d2fde47871a79d05075dcb55. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DECY61900027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a64f342ca720c7461b106d2624fbcbb7e43ae07a7923474c9e32e54182eb4ab. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DECY61900028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03bd5555a588f04e7414ee36f5ea002e8b8e079fdcd8e8b1fbcdb50cdaf1c8d1. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEVY92400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bafa98c37b8270b0bd833d75d1aef9f0f3fbc289e4381702ba59e262658c4c6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBJX32055003.
Disco Nostalgia - A Marvin & Guy Mix In Space
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708d0c2ccf9f8dcc9b3348252d66af3c9795f099b71f247fbe631b553cf5abb9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DECY62000069.
Disco Nostalgia (A Marvin & Guy Mix In Space)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708d0c2ccf9f8dcc9b3348252d66af3c9795f099b71f247fbe631b553cf5abb9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DECY62000069.
Now We're Ready To Spend - Marvin & Guy Version
Now We're Ready To Spend Remixes / Black Lake
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f784ca2c31f5afd41f4542340709a57ca98d2684d114a4107af54d011d3cc80. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLCK41057624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50cb84ebeaad3bb37b043ddbf11c377bb101d4c53754771b21ec5a8cea6fec77. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITN1Q2200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41087da34716e6283661575364e0117c375986bcfc012e1af9066620b2a72f59. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEU671701588.
Les Mystères de Lorient - Marvin & Guy Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x897d2eb27bf8b5e23826a3ba98ee6a80b5075a14824e58442dd9bf09836c4d3a. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR89W2100257.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch